Question

What is the difference between:

Electrolytic dissociation and ionisation.

Answer 1

	Dissociation	Ionisation
(1)	Separation of ions which are already present in an ionic compound.	Formation of positively or negatively charged ions from molecules which are not initially in the ionic state.
(2)	Electrovalent compounds show dissociation, e.g., potassium chloride, lead bromide, etc. \[\ce{KCl -> K+ + Cl-}\]	Polar covalent compounds show ionisation, e.g., HCl, NH4OH, etc. \[\ce{HCl->[H2O]H+ + Cl-}\]